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104086

NATURAL GAS HEATER

®

Confined and Unconfined Space

The National Fuel Gas Code ANS Z223.1
defines a confined space as a space whose
volume is less than 50 cubic feet per 1,000
Btu per hour (4.8 m3 per kw) of the aggre-
gate input rating of all appliances installed
in that space and an unconfined space as a
space whose volume is not less than 50
cubic feet per 1,000 Btu per hour (4.8 m3 per
kw) of the aggregate input rating of all
appliances installed in that space. Rooms
communicating directly with the space in
which the appliances are installed*, through
openings not furnished with doors, are con-
sidered a part of the unconfined space.

This heater shall not be installed in a con-
fined space or unusually tight construction
unless provisions are provided for adequate
combustion and ventilation air.

* Adjoining rooms are communicating only
if there are doorless passageways or ventila-
tion grills between them.

AIR FOR
COMBUSTION AND
VENTILATION

Today’s homes are built more energy effi-
cient than ever. New materials, increased
insulation, and new construction methods
help reduce heat loss in homes. Home owners
weather strip and caulk around windows and
doors to keep the cold air out and the warm air
in. During heating months, home owners
want their homes as airtight as possible.

While it is good to make your home energy
efficient, your home needs to breathe. Fresh
air must enter your home. All fuel-burning
appliances need fresh air for proper com-
bustion and ventilation.

Exhaust fans, fireplaces, clothes dryers, and
fuel burning appliances draw air from the
house to operate. You must provide ad-
equate fresh air for these appliances. This
will insure proper venting of vented fuel-
burning appliances.

PROVIDING ADEQUATE
VENTILATION

The following are excerpts from National
Fuel Gas Code. NFPA 54/ANS Z223.1, Sec-
tion 5.3, Air for Combustion and Ventilation.

All spaces in homes fall into one of the three
following ventilation classifications:

1.

Unusually Tight Construction

2.

Unconfined Space

3.

Confined Space

The information on pages 4 through 6 will
help you classify your space and provide
adequate ventilation.

Unusually Tight Construction

The air that leaks around doors and win-
dows may provide enough fresh air for
combustion and ventilation. However, in
buildings of unusually tight construction,
you must provide additional fresh air.

Unusually tight construction is de-
fined as construction where:

a.

walls and ceilings exposed to the
outside atmosphere have a con-
tinuous water vapor retarder with
a rating of one perm (6x10

-11

 kg

per pa-sec-m

2

) or less with open-

ings gasketed or sealed 

and

b. weather stripping has been

added on openable windows and
doors 

and

c.

caulking or sealants are applied
to areas such as joints around
window and door frames, be-
tween sole plates and floors, be-
tween wall-ceiling joints, be-
tween wall panels, at penetra-
tions for plumbing, electrical, and
gas lines, and at other openings.

If your home meets all of the three
criteria above, you must provide ad-
ditional fresh air. See 

Ventilation Air

From Outdoors, page 6.

If your home does not meet all of the
three criteria above, proceed to 

De-

termining Fresh-Air Flow For Heater
Location, page 5.

 WARNING: This heater shall

not be installed in a confined space
or unusually tight construction
unless provisions are provided
for adequate combustion and ven-
tilation air. Read the following in-
structions to insure proper fresh
air for this and other fuel-burning
appliances in your home.

Summary of Contents for Vanguard VN10TA

Page 1: ...byaqualifiedinstaller serviceagency orthe gas supplier WARNING Improper instal lation adjustment alteration service or maintenance can causeinjuryorpropertydam age Refer to this manual for correct installation and op erationalprocedures Foras sistance or additional infor mationconsultaqualifiedin staller serviceagency orthe gas supplier WARNING This is an unvented gas fired heater It uses air oxyg...

Page 2: ...ht safety system The ODS shuts down the heater if not enough fresh air is available See Air for Combustion and Ventilation pages 4 through 6 5 Keep all air openings in front and bot tom of heater clear and free of debris This will insure enough air for proper combustion 6 If heater shuts off do not relight until you provide fresh outside air If heater keeps shutting off have it serviced 7 Do not r...

Page 3: ...ter for shipment 3 Check heater for any shipping damage If heater is damaged promptly inform dealer where you bought heater PRODUCT FEATURES SAFETY PILOT This heater has a pilot with an Oxygen Depletion Sensing ODS safety shutoff system The ODS pilot is a required feature for vent free room heaters The ODS pilot shuts off the heater if there is not enough fresh air PIEZO IGNITION SYSTEM This heate...

Page 4: ... This will insure proper venting of vented fuel burning appliances PROVIDING ADEQUATE VENTILATION The following are excerpts from National Fuel Gas Code NFPA 54 ANS Z223 1 Sec tion5 3 AirforCombustionandVentilation All spaces in homes fall into one of the three following ventilation classifications 1 Unusually Tight Construction 2 Unconfined Space 3 Confined Space The information on pages 4 throug...

Page 5: ...r Do not include direct vent gas appliances Direct vent draws combustion air from the outdoors and vents to the outdoors 4 Compare the maximum Btu Hr the space can support with the actual amount of Btu Hr used _____________ Btu Hr maximum the space can support _____________ Btu Hr actual amount of Btu Hr used Example 46 100 Btu Hr maximum the space can support 50 000 Btu Hr actual amount of Btu Hr...

Page 6: ...djoiningunconfinedspace The combined spaces must have enough fresh air to supply all appliances in both spaces Ventilation Air From Outdoors Provide extra fresh air by using ventilation grills or ducts You must provide two per manent openings one within 12 of the ceiling and one within 12 of the floor Connect these items directly to the outdoors orspacesopentotheoutdoors Thesespaces include attics...

Page 7: ...fromfloor ceiling andjoin ing wall CAUTION If you install the heater in a home garage heater pilot and burner must be at least 18 inches above floor locate heater where moving vehicle will not hit it IMPORTANT Vent freeheatersaddmois ture to the air Although this is beneficial installing heater in rooms without enough ventilation air may cause mildew to form from too much moisture See Air for Com ...

Page 8: ...Method For attaching mounting screw to wall stud 1 Drill hole at marked location using 9 64 drill bit 2 Insert mounting screw into wall stud 3 Tighten screw until 1 16 space thick ness of penny is between screwhead and wall Attaching To Wall Anchor Method Follow instructions below to attach mount ing screws to hollow walls wall areas be tween studs or solid walls concrete or masonry 1 Drill holes ...

Page 9: ...ning Locate sedi ment trap where trapped matter is not likely to freeze A sediment trap traps moisture and contaminants This keeps them from going into heater controls If sediment trap is not installed or is installed wrong heater may not run properly IMPORTANT Hold pressure regulator with wrench when connecting it to gas pip ing and or fittings IMPORTANT Check gas line pressure before connecting ...

Page 10: ...oropeningmaingas valve located on or near gas meter 3 Check all joints from gas meter to equipment shutoff valve see Figure 14 Apply mixture of liquid soap and water to gas joints Bubbles forming show a leak 4 Correct all leaks at once CHECKING GAS CONNECTIONS WARNING Test all gas pip ing and connections for leaks after installing or servicing Cor rect all leaks at once WARNING Neveruseanopen flam...

Page 11: ...perature Selecting a higher setting will cause the heater to run longer producing greater heat output At lower settings the heater will run less Note The thermostat sensing bulb mea sures the temperature of air near the heatercabinet Thismaynotalwaysagree with room temperature depending on housing construction installation loca tion room size open air temperatures etc Frequent use of your heater w...

Page 12: ...e 17 Correct Pilot Flame Pattern BURNER FLAME PATTERN Figure 19 shows a correct burner flame pattern Figure20showsanincorrectburner flame pattern Ifburnerflamepatternisincorrect asshown in Figure 20 turn heater off see To Turn Off Gas to Appliance page 11 see Troubleshooting pages 13 through 15 CABINET Air Passageways Use a vacuum cleaner or pressurized air to clean Exterior Use a soft cloth dampe...

Page 13: ... 6 Replace piezo ignitor 7 Replace ignitor 1 Turn on gas supply or open equipment shutoff valve 2 Turn control knob to PILOT position 3 Press in control knob while in PILOT position 4 Continue holding down control knob Repeat igniting operation until air is removed 5 Clean ODS pilot see Cleaning and Maintenance page 12 or replace ODS pilot assembly 6 Replace gas regulator 1 Press in control knob f...

Page 14: ...d Maintenance page 12 or replace burner orifice s 2 Contact local natural gas company 3 Replace burner 4 Replace gas regulator 1 Plaque damaged 2 Inlet gas pressure is too low 3 Control knob set too low 1 Residues from manufacturing processes 1 Metal expanding while heating or contracting while cooling 1 When heated vapors from furniture polish wax carpet cleaners etc turn into a white powder resi...

Page 15: ...onwindows POSSIBLE CAUSE 1 Heater burning vapors from paint hair spray glues etc See IMPORTANT statement above 2 Gas leak See Warning statement at top of page 1 Not enough fresh air is available 2 Low line pressure 3 ODS pilot is partially clogged 1 Gas leak See Warning statement at top of page 2 Control valve defective 1 Foreign matter between control valve and burner 2 Gas leak See Warning state...

Page 16: ...16 104086 NATURAL GAS HEATER 12 A B 16 7 8 4 6 5 3 2 1 11 14 13 19 18 6 17 15 16 10 9 7 1 ODS PILOT 7 2 ILLUSTRATED PARTS LIST VN10TA ...

Page 17: ...823 37 Screw Hex 8 x 1 4 10 7 503329 ODS Pilot Assembly 1 7 1 098514 01 Thermocouple 1 7 2 098594 01 Ignitor Electrode 1 8 099884 03 Burner Assembly 1 9 099056 24 Injector 1 10 104087 01 Tubing Burner 1 11 099387 11 Pilot Tubing Valve to pilot 1 12 M11084 26 Screw 10 x 3 8 2 13 104084 01 Tubing Inlet 1 14 098522 16 Control Valve 1 15 097159 04 Piezo Ignitor 1 16 098271 03 Ignitor Cable 1 17 102571...

Page 18: ...ey cannot sup ply original replacement part s call DESA International s Technical Service Depart ment at 1 800 323 5190 for information When contacting your dealer or DESA In ternational have ready your name your address model and serial numbers of your heater how heater was malfunctioning typeofgasused propane LPornaturalgas purchase date Usually we will ask you to return the defec tive part to t...

Page 19: ...____________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ ___________________________________________________________________________________________...

Page 20: ...he heater MUST be installed by a qualified installer in accordance with all local codes and instructions furnished with the unit This warranty does not apply to parts that are not in original condition because of normal wear and tear or parts that fail or become damaged as a result of misuse accidents lack of proper maintenance or defects caused by improper installation Travel diagnostic cost labo...

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